Combined calipers and protractor.



V. GONSTANTINESCU. COMBINED GALIPERS AND PROTRAGTOR. APPLIUATION FILED 11113.15, 1912.

1,039,901. v Patented Oct.1,1912.

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Immmmmmmw lUmfang A V. GONSTANTINBsc-U; COMBINED CALIPERS AND PROTRAGTOR.

I APPLICATION ILBD MAR.5, 1912. I 1,039,901, i Patented Oct. 1, 191.2..l

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VASILE CONSTANTINESCU, F NELSON, BIRITISH COLUMBIA, CANADA.

COMBINED CALIPERS AND PROTRACTOR.

Specification of Letters Patent.

Patented Oct. 1, 1912.

Application filed March 5, 1912. Serial No. 681,780.

To all whom it 'may concern.'

Be it known that I,.VAs1LE CONSTAN- 'r1NnsoU, a citizen of the Dominion of Canada, residing at Nelson, in the Province of British Columbia and Dominion of Canada,

have invented certain new and useful fimprovements in Combined Calipers and Protractors, of which the following is a specilication.

rlhe present invention relates to a combined registering caliper and protractor, for

use in measuring the interior and exterior of cylindrical andl tapered work.

An important object of my invention is to provide a. device of the above mentioned character, having means for ascertaining the taper of a piece of Work in inches or the like per foot. A

A further object of my invention is to provide means of the above mentioned character, which may be quickly adjust-ed to the work and will give accurate figures or readings.

A further object of my invention is to provide means of the above mentioned character, which are simple in construction, easy to operate, and cheap to manufacture.

@ther objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawii'igs forming a part of this specitication and in which like numerals are employed to designate like parts throughoutl the same, Figure 1 is a plan view of the device, showing it applied to a piece of tapered work, Fig. 2 is a sectional view taken on line 2 2 of Fig. 1 and looking in the direction of the arrows, Fig. 3 is longitudinal sectional view taken on line iS-3 of lFig. 1 and looking in the direction of the arrow, Fig. 4 is a detail sectional vview taken on line 4-4 of l? ig. 1, llig. 5 is a similar View taken on line 5-*5 o.. 'iiig. 1, Fig. C is a fragmentary view of one end of the protractor, showing the protractor leg reversed, and, Fig. 7 is an enfragmentary plan view of a calculatmg scale.

ltn the vdrawings wherein for the sake. ol. illustration, l have shown a preferred einbodiment of my invention, the numeral l designates the body portion or base of the protractor, comprising a sector or protractor plate 2, having the usual degree graduations 3 formed thereon, as shown.

' The numeral 4 designates a caliper blade, provided with a scale 5 laid out in inches and fractions thereof. This caliper blade 4 has one end thereof pivo-tally connected with the base 1 of the preti-actor, by means of a screw G o r the like.A The sector plate 2 is provided with a curved slot 7, vfor receiving a clan'iping screw 8, carried by the caliper blade 4, as shown. By the manipulation of this clamping screw 8 the caliper blade 4 may be securely locked in adjustment at different angular positions with relation to the sector or protractor plate 2.

The protractor blade 4 has a curved calculating plate 9, rigidly connected therewith by means of screws l() or the like. This plate S) is disposed adjacent the sector plate 2 and is provided with a scale 1l, graduated in inches and fractions thereof, as shown. This scale has a central zero mark and the grad-nations increase to the right and left of the same, as shown. rlhe zero mark of the scale 11 is adapted to normally coincide with the ninety degree mark of the scale 3. The graduations of the scale 11 are designa-ted by numerals or calculations 12, which indicate the rise in inches per foot of the work having the angle of taper as ascertained on the scale 3. Attention is called to the fact that the graduations of the scale 11 are adapted to coincide with those of the scale 3.

Slidably mounted upon the caliper blade 4 is a transverse carriage 13, -having an opening 14 formed therethrough for receiving this blade. The carriage 18 is provided with a. clamping screw l5, having its inner end operating in a slot 16 formed upon the up per face of the caliper blade 4 and extending longitudinally thereof. The carriage 13 is provided upon its inner face and midway its ends with a beveled portion 17, to cooperate with the scale, 5. In order that the carriage 123 may not move too freely longitudinally of the blade 4, I provide such carthe caliper blade 4 is an adjusting carriage- 20, carrying a clampingbscrew 21, which cngages a bow-spring 22, interposed between the end of the carriage 20 and the edge of the caliper blade 4. The spring 22 prevents the carriage 20 from being moved too freely longitudinally ot' the blade et and the screw 2l may be manipulated to clam or lock the adjusting carriage 20 to the caliper blade 4. Pivotally connected with the transverse or main carriage 13 is a screw 23, as shown at 24.. This screw passes through a suitably large opening in the free end of the adjustA ing carriage 20. An adjusting nut 25 is carried by the screw 23 and operates within an opening formed in they carriage 20. Asprin 26 surrounds the screw 23 and is interposed between the adjusting carriage 20 and the transverse carriage 13 to take up any loose motion between these carriages.

The 'base `1 of the protractor carries at its ends depending caliper legs 27, which are preferably curved longitudinally, as shown. The caliper legs 27 have heads or carriages 28 formed upon their upper ends, which slidably engage the under surface of the base l. These carriages 28 are provided with upstending screws 29, extending through a longitudinal slot 30, which is formed through the base 1. The screws 29 carry thumb or clamping nuts 31which engage the upper face of the base 1 and are adapted to securely lock the caliper legs 27 in adjustment atdifl'erent positions upon the base l. The carriages 28 are provided with upstanding flanges or guides 32, adapted to slidably'engage the outer longitudinal edge' of the base l. When the device is used for 1 measuring the exterior of work, the caliper legs 27 extend inwardly. Vthen it is desired to measure the interior of work, these caliper legs must be arranged to extend outwardly. This is accomplished by interchanging the caliper' legs 27. When this is done the flanges or guides 32 will be disposedto .operate within longitudinal slots It is thus seen that the caliper legs 27 are adjustable so as to measure the exterior and interior of work and may also be adjusted longitudinally of the base l toward and away from each other, depending upon the length. of the piece of work which is to be measured.

The main or transverse carriage 13 carries at its ends depcndingcaliper legs 34, which are curved longitudinally and of the saine shape as the oppositely arranged caliper legs 27. The caliper legs 34 have heads or carriages 35 formed upon their u per ends, which are provided with upstanging flanges or guides 3G, having slidable engage ment with the longitudinal edges oi the carriage 13. The carriage or heads 35 carry upstanding screws 37, operating through longitudinal slots 3S, and provided above the carriage 13 with. thunib or clamping nuts 39. The upper and lower caliperlegs 34 may be readily interclianged so that they may extend outwardly instead ol inwardly, for the reason stated in connection with the caliper legs 27.

The operation of the device'is as follows: lVhen the device is used as a caliper for measuring the exterior of cylindrical work, the main carriage 13 is properly adjusted so that the work may be placed between the pairs of caliper legs 27 and rl`he. :cero mark oli the scale l1 now coincides with the ninety degree mark of the scale 3, whereby the base 1 is arranged at right angles to the caliper blade 1. The screw 2l is clamped to the blade 4 for holding the carriage 2U against movement, subsequently to which the adjusting nut 25 is turned to elfcet a line adjust-ment of the carriage It is thus seen that the diameter of the work will be indicated by the portion 17 on the scale 5.

When it is desired to measure a tapered piece of work the pairs of caliper legs 2T and 34 are moved sufficiently far apart to permit. of the tapered work being placed therebetween. The clamping nutor screw 8 is now turned to permit of the caliper blade l being swung to 4assume the desired angular position with relation to the base l, which of course depends upon the angle ol taper of the work. The caliper legs 27 and 3l are now moved into engagement with the piece of tapered work and the clamping screw .0 turned to securely7 hold the blade l in its adjusted position. The fine adjustment of they .A

carriage 13 may be had by the nianipulutimi of the carriage 20 and its adjusting nut 25, as hereinabove described.. The carriage l?. may be securely clamped in' its afiusted position by turning the elanniin-g screw I3. As shown in Fig. l, the device is applied to a piece ottapercd work. The zero mark ot the scale l1 is now thirteen degrees 'from the. ninety degree mark of the scale 3, indicating on the scale 3 that the angle of taper is thirl teen degrees. rl `he ninety .legree mark oiv the scale 3 now points to the graduation on the scale 1l, which is designated by two and one-lnindred-nine oneehundredand-sixtit hs (see Fig. 7) which indicates the rise in inches per foot of the work having an :ingle of taper of thirteen degrees.

Suppose that it is known that the desired piece of work is to have an angle o'l taper ot thirteen degrees. rlhe blade A'lis then adjusted to assume the position shown in Fig. l, whereby 1t will be found that the rise in inches per 'foot 'is two and one-hundredfninc till lOC

.l lll one=hundred-and-siXtieths. The length of the piece of workis measured and the operating parts of the lathe are accordingly adn justed to correspond with this rise in inches per foot.

The device may be used to measure short work which is accomplished by bringing the caliper legs in each pair closer together and clamping them in their adjusted positions.

The device may be readily employed as an interior caliper for measuring cylindrical and tapered grooves. When this is to be done the caliper' legs in each pair are interchanged so that they will extend outwardly instead of inwardly. The operation then proceeds in a similar manner as has been stated.

It is to be understood that the form of my invention herewith shown and described is to be taken as a vpreferred example of the `same and that certain changes in the shape,

size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subV joined claims.

Having thus described my invention,4 I claim l. In a device of the character described, a caliper comprising a base plate and sector provided with a scale, caliper legs longitudinally adjustably mounted upon said base plate, a caliper blade pivotally connected with the base plate, means to clamp the caliper blade to the protractor in adjustment at different angular positions, a carriage longit'udinally movably mounted upon the caliper blade, and caliper legs longitudinally adjustably mounted upon lthe carriage.

2. In a device of the character described, a preti-actor comprising a sector having a scale, a set of caliper legs carried by the protractor, means whereby the caliper legs .in this set may be adjusted and intcrchanged, a caliper blade pivotally connected with said protractor and provided with a scale, a

` graduated calculating plate connected with the caliper blade and operating adjacent said sector and having its graduations designated Aby numerals indicating the rise in inches per foot of the work for a given angle ascertained on the sector scale, a carriage longitudinally movably mounted on the caliper blade, caliper legs connected with the carriage, and means whereby such caliper legs may be adjusted and interchanged. 3. In a device of the character described, a protractor plate provided with a scale, in terchangcable caliper legs removably mounted upon the protractor plate, a. caliper blade pivotally connected with the protractor plate and provided with a scale, a carriage mounted upon the caliper blade to be moved longitudinally thereof, and interchangeable caliper legs connected with the carriage.

fi. In a device of the character described, a protractor plate provided with a scale, caliper legs adjustably mounted upon the protractor plate to be moved toward and away from each other, a caliper blade pivot1 ally connected with the protractor plate and provided with a scale, a carriage adjustably mounted upon the caliper blade to be moved longitudinally thereof, and caliper legs adjustably mounted upon the carriage to be moved thereon toward and away from eachI other.

5. In a device ot' the character described, a protractor plate provided with a scale, curved caliper legs removably mounted upon the protractor plate and adapted to be interchanged, a caliper blade pivotally connected with the protractor plate and provided with a scale, a carriage adjustably mounted upon the caliper blade to be moved longitudinally of the same, and curved caliper legs removably mounted upon the carriage and adapted to be interchanged.

6. In a device of the character described, a protractor plate provided with a scale, caliper legs connected with the protractor plate near the ends thereof, a caliper blade pivotally connected with the protractor platenbetween said caliper legs, said caliper blade being provided with a scale, a car riage mounted upon the caliper blade to be moved longitudinally thereof, and caliper legs connected with the carriage near the ends thereof.

7. In a device of the character described, a protractor plate including base and sector portions, the sector portion being provided with a scale, caliper legs connected with the base portion near the ends thereof, a caliper blade pivot-ally connected with the base por tion between said caliper legs, a clamping device connected with the caliper blade. and engaging the sectorportion, .a carriage eX- tending transversely ot the caliper blade and adapted to be moved longitudinally ot the saine, and caliper legs connected with the end portions of the carriage.

8. In a device of the character described, a protractor plate including base and sector portions, the sector portion being provided with a scale and longitudinal slot, caliper legs connected with'tlie base portion near the ends thereof, a caliper blade pivotally connected with the base portion between said caliper legs, a clainping device connected with the caliper blade and operating within the longitudinal slot of: the sector portion, a sector provided with a scale and rigidly connected with the caliper blade to operate adjacent the sector portion, a carriage extending transversely ol. the caliper blade, and caliper legs coiu'iected with. the carriage.

9. In a' device of the character described,

llO

. caliper legs, means for defining the angle et which the caliper blade is set 'With relation' -to the said plate, a carriage movably mounted upon 'the caliper blade,

and caliper lege connected Wlth the carnage near the ends 'thereof to be disposed in, opposition lo the rst named caliper legs.

In testimony whereof ex my signature in presence of two witnesses.

VASLE CONSTAIINESCU. l/Vitnesses:

WM. H. BULLOCK. lVnsTnn, J. H, LAWRENCE. 

